these patterns are intended to be done with scale rulers based on imperial measurements. meaning its based off inches so divisions of 8.if you can math you should be able to find the correct scale. if you cant ... i would suggest either finding someone who can or just drafting it out with a standard ruler and making adjustments from there.

Contains to-scale patterns of fashionable late 19th century clothing: puffed sleeves, narrow waists, A-line skirts. Mostly women's dresses, but it has some children's clothing and a few men's patterns as well.

I haven't read the entire book, but an initial skim didn't reveal any instructions on how to size the patterns. There are numbers printed on the patterns that appear to be measurements or scale indicators, but I haven't figured them out yet.

The patterns are inspiring and would be sufficiently informative for someone with more pattern drafting knowledge.